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Physical and infrared optical properties of mixed SrF2-CaF2 thin films

Yu Tian-Yan Qin Yang Liu Ding-Quan Zhang Feng-Shan

Physical and infrared optical properties of mixed SrF2-CaF2 thin films

Yu Tian-Yan, Qin Yang, Liu Ding-Quan, Zhang Feng-Shan
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  • Abstract views:  3382
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  • Received Date:  25 March 2009
  • Accepted Date:  20 July 2009
  • Published Online:  15 April 2010

Physical and infrared optical properties of mixed SrF2-CaF2 thin films

  • 1. 中国科学院上海技术物理研究所,光学薄膜与材料研究室,上海 200083

Abstract: The mixed SrF2-CaF2 thin films with the same thickness were deposited by the techniques of resistant evaporation and electron beam evaporation respectively. The physical and infrared optical properties of the thin films were investigated. The optical constants in the infrared region were determined quantitatively which fills the gap of these data. At the same time, we provided a method to obtain gradient index films. We also used the mixed SrF2-CaF2 with a proportion of 1∶1 as the lower index material to deposit multilayer coatings. A broadband antireflection coatings with high optical performance was developed.

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